G 3500 1 Ton Van V8-350 5.7L VIN K TBI (1987)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - New PROM (Driveability/False Lights)
GMC NUMBER:
88-T-109
GROUP:
6E - Engine Emission
DATE:
May, 1988
CORPORATE
NUMBER:
836501R
SUBJECT:
REVISED PROMS: TO ADDRESS DRIVEABILITY AND ELIMINATE FALSE "SERVICE ENGINE SOON" LIGHTS
MODELS:
1987 AND EARLY 1988 R/V, C/K, AND G MODELS WITH 5.0L (VIN CODE H) AND 5.7L (VIN CODE K) ENGINES AND LIGHT
DUTY EMISSIONS
THIS BULLETIN CANCELS AND SUPERSEDES TRUCK SERVICE BULLETIN 88-T-25 ALL COPIES OF WHICH SHOULD BE DESTROYED.
THIS REVISION IS TO UPDATE PROM P/N'S AND ADD LABOR OP. AND TIME.
Some 1987 and early built 1988 RN, C/K and G models with TBI engines may experience one or more of the following driveability conditions and/or
false codes. If these conditions are experienced, they can be repaired by replacing the PROMs.